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The elimination kinetics of secondary Alkyl Bromides in the gas phase

✍ Scribed by Gabriel Chuchani; Ignacio Martín; Alexandra Rotinov; Rosa M. Domínguez

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
349 KB
Volume
22
Category
Article
ISSN
0538-8066

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✦ Synopsis

Elimination kinetics of 2-bromohexane and 2-bromo-4-methylpentane in the gas phase were examined over the temperature range of 310-360°C and pressure range of 46-213 torr. The reactions in seasoned, static reaction vessels, and in the presence of the free radical inhibitor cyclohexene, are homogeneous, unimolecular, and follow first order rate laws. The overall rate coefficients are described by the following Arrhenius equations: For 2-bromohexane, log k l ( s -' ) = (13.08 2 0.70) -(185.7 2 8.2) k J mol-' (2.303RT)-'; for 2-bromo-4-methylpentane, log kl(s-') = (13.08 2 0.33) -(183.4 2 3.8) k J mol-' (2.303lW-l. The electron releasing effect of alkyl groups influences the overall elimination rates. The olefin products isomerize in the presence of HBr gas until an equilibrium mixture is reached.

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